GB953904A - Process for colouring cellulose textile materials - Google Patents

Abstract

The sodium salt of N-{b -[4-(11-hydroxy-31-sulpho - 6 - aminonaphth - 21 - ylazo) phenyl-sulphonyl] ethyl} pyridinium chloride is prepared by coupling diazotized N-[b -(4-amino-phenylsulphonyl) ethyl] pyridinium chloride with 2 - amino - 5 - naphthol - 7 - sulphonic acid in alkaline medium. The disodium salt of N-{b -[4-(11-hydroxy-81 - amino - 31:61 - disulphonaphth - 21 - ylyzo)-phenylsulphonyl] ethyl} pyridinium chloride is prepared in an analogous manner. A copper phthalocyanine dye containing 1.8-SO3Na groups, 0.7-SO2NH2 groups and 1.5 <FORM:0953904/C3/1> groups per molecule is obtained by reacting an aqueous paste of copper phthalocyanine tetra-3 - sulphonchloride with b - chloroethylamine at pH 8, acidifying and quarternating with pyridine in aqueous medium. Copper phthalocyanine dyes are prepared by quarternating the dyestuff of Examples 1 and 7 of Specification 826,689 with (a) pyridine and (b) 1:4 - diazabicyclo - (2:2:2) - octane. Mixtures of dyes.-Any of the above type of dye may be used in admixture with the corresponding unquarternated dye e.g. a mixture of the disodium salts of 4(21-hydroxy-31:61-disulphonaphth - 11 - ylazo) phenylsulphon - N-b - chloroethylamide with 4 - {b - [41 - (211 - hydroxy - 311:611 - disulphonaphth - 111 - ylazo)-phenylsulphonamido] ethyl} - 1 - aza - 4 - azo-nia - bicyclo - (2:2:2) - octane chloride and mixtures of the phthalocyanine dyes in Examples 1 and 7 of Specification 826,689 with any of the above phthalocyamines. Specifications 740,553, 845,567, 852,960, 867,546, 870,047, 881,737, 882,750, 885,059, 885,549 and 885,681 also are referred to.ALSO:Cellulose textile materials are dyed or printed, in conjunction with a treatment with an acidbinding agent, with (a) a dyestuff which contains at least one group of the formula <FORM:0953904/D1-D2/1> wherein n is 1 or 2, A is an alkylene radical which may be substituted, X is -CO-, -SO2, -NHCO-, -CONH- or -SO2N(R)- wherein R is H or a hydrocarbon radical which may be substituted, and V1, V2 and V3 each represent a hydrocarbon or heterocyclic radical or at least two of them join with the N to form a heterocyclic ring containing either single or double bonds, provided that the dye contains at least as many -SO3 H and/or -COOH groups as groups of formula I or (b) a mixture of a dyestuff containing at least one group of formula I and a dyestuff which contains at least one -SO3H and/or -COOH group and at least one group of the formula <FORM:0953904/D1-D2/2> wherein Q is -Cl, -Br or a sulphate ester group or a group -S-Z wherein Z is a hydrocarbon or heterocyclic radical which may be substituted or a group of the formula <FORM:0953904/D1-D2/3> wherein R1 and R2 each represent a hydrocarbon or heterocyclic radical which may be substituted or R1 and R2 form a heterocyclic ring together with the N and n is 1 or 2. Each of the groups of formulae I and II is attached to a carbon atom of an aryl nucleus in the dyestuff which may be of the mono- or polyazo, nitro, anthraquinone, polycyclic vat or phthalocyanine series and may contain coordinately bound Cu, Cr or Co. Many radicals are specified. The dyes or dye mixtures may be applied from a dyebath or by padding or printing and the acid binding agent may be applied before, during or after the dyeing operation. Fixation may be achieved in the dyebath by adding the acid binding agent or by dry heating or steaming the impregnated material. Many acid binding agents are specified. The dyebaths or print pastes may further contain sodium chloride or sulphate, urea, dispersing agents surfactants, sodium alginate and/or an emulsion of trichlorethylene in water. The specified cellulose materials are cotton, linen, viscose rayon, polynosic rayons and high wet modulus rayons. Mixtures of dyes containing groups of formula I and dyes containing groups of formula II may be prepared by mixing or grinding the said dyes together in the desired proportions or by coprecipitating them from aqueous solutions or alternatively by merely adding the two sorts of dye to the dyebath. The preferred proportion is 75-90% of dyes containing groups of formula II. Examples are given. Specifications 740,553, 826,689, 845,567, 852,960, 867,546, 870,047, 881,737, 882,750, 885,059, 885,547 and 885,681 are referred to.